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Coupling constants in N-substituted pyridines and their relation with electronegativity

✍ Scribed by Alan R. Katritzky; Michael Kinns; Edward Lunt

Book ID: 102531277
Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 205 KB
Volume: 7
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270071110

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✦ Synopsis

Abstract

The coupling constants obtained from the complete spectral analysis of series of 1‐ and 3‐substituted pyridine N‐imides are related linearly to the electronegativities of the substituent atoms. The main conclusions of the papers by Cox, Castellano and Sun, and Castellano and Kostelnik are substantiated. The inductive effects of the first atoms of the substituents largely determine the coupling between protons in the ring system; delocalisation of π‐electrons in the ring produces a much smaller effect.

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